PLATE LXXXVIII. 



Callipterus betulicola. (Page 15.) 



Fig. 1. — Winged viviparous female. The body, 

 antennae, and legs are irregularly tufted with cotton- 

 like matter. The length and delicacy of the wings 

 may be noted. 



Fig. 2. — Profile view of the apterous viviparous 

 female. 



Fig. 3. — Part of the antenna of Fig. 1. 



Callipteeus coryli. (Page 17.) 



Fig. 4. — Apterous viviparous female. 



Fig. 5. — Winged female. The wings are folded 

 pent-wise, as is usual in Aphis when the insect is at 

 rest. 



Fig. 6. — Head and antennae of the last insect. 



Eig. 7. — Anal valves and nectaries of winged female. 

 Similar appendages are visible, more or less markedly 

 in all the species of this genus. 



